Environment-friendly energy-saving parallel-connection temperature-humidity regulation and control equipment

ABSTRACT

The utility model relates to environment-friendly energy-saving parallel-connection temperature-humidity regulation and control equipment, which includes a compressor unit, a condenser, an evaporation coil and a secondary heat exchange coil which are connected with one another through pipelines, wherein the evaporation coil and the secondary heat exchange coil are disposed in a temperature-humidity controlled region, and the temperature-humidity controlled region is further internally provided with a temperature-humidity transmitter; and further includes a bypass electromagnetic valve and an intelligent control cabinet

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of International Patent Application No. PCT/CN2016/000023 with a filing date of Jan. 14, 2016, designating the United States, now pending, and further claims priority to Chinese Patent. Application No. 201520028338.8 with a filing date of Jan. 15, 2015. The content of the aforementioned applications, including any intervening amendments thereto, are incorporated herein by reference.

TECHNICAL FIELD

The utility model relates to environment-friendly energy-saving parallel-connection temperature-humidity regulation and control equipment.

BACKGROUND OF THE PRESENT INVENTION

With the progress of the science and technology and the development of human society, requirements for controlling ambient temperature and relative humidity in production, transportation, storage and other processes of products in more and more fields are higher and higher. For example, in industries such as electrons, chemical industry, food, medicine and the like, in order to improve and ensure a yield of the products or in order to prevent deterioration of materials, there are requirements for controlling temperature and humidity of relevant environments; and with the increase of, requirements of technological demands for the ambient temperature and humidity, the development and progress of temperature-humidity regulation technologies are promoted.

“Chinese Pharmacopoeia” and “Good Supply Practice for Pharmaceutical Products” in the pharmaceutical industry have definite requirements for the temperature, relative humidity and the like of a drug storage environment. For example, relevant requirements for a conventional refrigerating chamber: dry-bulb temperature in the refrigerating chamber is between 2° C. and 8° C. and the relative humidity is between 35% and 75%.

The control on the relative humidity under such refrigerating working condition is more difficult than the control on the humidity under an air conditioner working condition because the saturated water vapor pressure of wet air in a low-temperature environment is lower, and the air of unit mass can accommodate less water vapor; a conventional refrigerating process has a certain dehumidification capacity, but the relative humidity in the refrigerating chamber is difficult to keep below 75% by virtue of the condensation dehumidification accompanied in a refrigerating process under a low temperature working condition of the refrigerating chamber, so that in order o realize a purpose of controlling the relative humidity of the refrigerating chamber, a temperature regulation and dehumidification function is realized by enabling a conventional air cooler to be operated at a low air volume and adding auxiliary electric heating between an evaporation coil and a fan in the present actual application. This mode can realize the temperature-humidity control objective of the refrigerating chamber to certain extent, but the energy consumption is large by adopting the auxiliary electric heating way to compensate the heat, and safety potential hazards exist, so that this mode is not suitable for popularization and use.

SUMMARY OF PRESENT INVENTION

A primary objective of the utility model is to provide environment-friendly energy-saving parallel-connection temperature-humidity regulation and control equipment which is small in temperature-humidity control energy consumption and suitable for popularization and use. In order to realize the above objective, a specific solution of the utility model is as follows:

Environment-friendly energy-saving parallel-connection temperature-humidity regulation and control equipment comprises:

a compressor unit, an oil separator, a condenser, indoor heat exchanger units and a gas-liquid separator which are connected with one another through pipelines; the compressor unit comprises two or more compressors, and the compressors adopt a same model or different model; the number of the indoor heat exchanger units is two or more, each indoor heat exchanger unit comprises an evaporation coil and a secondary heat exchanging coil, wherein the evaporation coil and the secondary heat exchanging coil are disposed in a temperature-humidity controlled region (100), and the temperature-humidity controlled region (100) is further internally provided with a temperature-humidity transmitter.

The output end of the compressor unit is connected with the input end of the condenser through the oil separator; the output end of the condenser is divided into two paths; one path is connected with the input end of the evaporation coil through an evaporation coil electromagnetic valve, and the other path is connected with the input end of the secondary heat exchanging coil through a secondary heat exchanging coil electromagnetic valve, and the output end of the secondary heat exchanging coil is connected with the input end of a check valve, and the output end of the check valve and the output end of the evaporation coil electromagnetic valve are combined into one path and then jointly connected to the input end of the evaporation coil through a throttling apparatus, and the output end of the evaporation coil is connected to the input end of the compressor unit through the gas-liquid separator.

The environment-friendly energy-saving parallel-connection temperature-humidity regulation and control equipment further comprises a bypass electromagnetic valve, wherein one end of the bypass electromagnetic valve is connected onto a pipeline between the output end of the compressor unit and the input end of the condenser, and the other end is connected onto a pipeline before the output end of the condenser is divided into two paths.

The environment-friendly energy-saving parallel-connection temperature-humidity regulation and control equipment further comprises an intelligent control cabinet, wherein the compressor unit, the bypass electromagnetic valve, the evaporation coil electromagnetic valve, the secondary heat exchanging coil electromagnetic valve and the temperature-humidity transmitter are respectively electrically connected with the intelligent control cabinet.

Preferably, the environment-friendly energy-saving parallel-connection temperature-humidity regulation and control equipment further comprises a liquid storage device, wherein the liquid storage device is connected in series onto a pipeline before the output end of the condenser is divided into two paths; one end of the bypass electromagnetic valve is connected onto the pipeline between the output end of the compressor unit and the input end of the condenser, and the other end is connected to the output end of the liquid storage device.

Preferably, the environment-friendly energy-saving parallel-connection temperature-humidity regulation and control equipment further comprises an external rotor motor electrically connected with the intelligent control cabinet, wherein the external rotor motor is disposed at one side of the evaporation coil, a negative pressure opening of the external rotor motor is opposite to the evaporation coil, and the secondary heat exchanging coil is disposed between the evaporation coil and the external rotor motor.

Preferably, the environment-friendly energy-saving parallel-connection temperature-humidity regulation and control equipment further comprises a high pressure sensor, a low pressure sensor and first controllers which are electrically connected with the intelligent control cabinet respectively, wherein the high pressure sensor is arranged at the output end of the compressor unit, the low pressure sensor is arranged at the input end of the compressor unit, and each compressor is respectively provided with the first controller,

Preferably, the compressor unit is further provided with a second main controller.

Preferably, the environment-friendly energy-saving parallel-connection temperature-humidity regulation and control equipment further comprises electronic oil balancers, wherein the electronic oil balancers are respectively arranged between each compressor and the oil separator.

Preferably, the throttling apparatus is a thermal expansion valve, wherein the thermal expansion valve comprises a valve body, a capillary tube and a temperature sensing bulb, the temperature sensing bulb is arranged at the output end of the evaporation coil, and the temperature sensing bulb is connected with the valve body through the capillary tube.

Preferably, the secondary heat exchanging coil is a fin-type condenser.

According to the environment-friendly energy-saving parallel-connection temperature-humidity regulation and control equipment provided by the utility model, on the basis of a conventional refrigerating system, a secondary condensation heat exchange coil is additionally arranged at an indoor evaporation coil, the condensation waste heat of exhausted air of the compressor unit is used for heating circulating air subjected to the freezing heat exchange of an evaporator, the temperature-humidity coordination is realized through a bypass pipeline at the output end of the compressor unit, and no additional electric power is consumed by adopting the condensation waste heat; and furthermore, the compressor unit consists of a plurality of compressors which can be automatically loaded and unloaded according to a load demand at a terminal. The mode has the biggest advantage that the operation energy consumption of the system is reduced, thereby realizing low energy consumption and suitability for, popularization and use.

DESCRIPTION OF THE DRAWINGS

The drawings described herein are intended to provide a further understanding of the utility model, constitute a part of the present application, and do not constitute an improper limitation to the utility model. In the drawings:

FIG. 1 is a structural schematic diagram of a system of embodiments of the utility model.

1, compressor; 2, oil separator; 3, condenser; 4, bypass electromagnetic valve; 5, liquid storage device; 6, gas-liquid separator; 7, intelligent control cabinet; 8, evaporation coil electromagnetic valve; 9, secondary heat exchanging coil electromagnetic valve; 10, throttling apparatus; 11, check valve; 12 indoor heat exchanger unit; 13, evaporation coil 14, secondary heat exchanging coil; 15, external rotor motor; 16, low pressure sensor; 17, high pressure sensor; 18, first controller; 19 second main controller; 20 electronic oil balancer; 21, temperature-humidity transmitter; and 100, temperature-humidity controlled region,

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

The utility model is described below in detail in combination with the drawings and specific embodiments, and the exemplary embodiments and description of the utility model are intended to explain the utility model and riot to be construed as a limitation to the utility model.

Embodiments

As shown in FIG. 1, environment-friendly energy-saving parallel-connection temperature-humidity regulation and control equipment comprises

a compressor unit, an oil separator 2, a condenser 3, indoor heat exchanger units 12 and a gas-liquid separator 6 which are connected with one another through pipelines; the compressor unit includes, two or more compressors 1, and the compressors 1 adopt a same model or different models; the number of the indoor heat exchanger units 12 is two or more, each indoor heat exchanger unit includes an evaporation coil 13 and a secondary heat exchanging coil 14, wherein the evaporation coil 13 and the secondary heat exchanging coil 14 are disposed in a temperature-humidity controlled region 100, and the temperature-humidity controlled region 100 is further internally provided with a temperature-humidity transmitter 21.

The output end of the compressor unit is connected with the input end of the condenser 3 through the oil separator 2; the output end of the condenser 3 is divided into two paths; one path is connected with the input end of the evaporation coil 13 through an evaporation coil electromagnetic valve 8, and the other path is connected with the input end of the secondary heat exchanging coil 14 through a secondary heat exchanging coil electromagnetic valve 9; the output end of the secondary heat exchanging coil 14 is connected with the input end of a check valve 11, and the output end of the check valve 11 and the output end of the evaporation coil electromagnetic valve 8 are combined into one path and then jointly connected to the input end of the evaporation coil 13 through a throttling apparatus 10, and the output end of the evaporation coil 13 is connected to the input end of the compressor unit through the gas-liquid separator 6.

The environment-friendly energy-saving parallel-connection temperature-humidity regulation and control equipment further comprises a bypass electromagnetic valve 4, wherein one end of the bypass electromagnetic valve 4 is connected onto a pipeline between the output end of the compressor unit and the input end of the condenser 3, and the other end is connected onto a pipeline before the output end of the condenser 3 is divided into two paths.

The environment-friendly energy-saving parallel-connection temperature-humidity regulation and control equipment further comprises n intelligent control cabinet 7, wherein the compressor unit, the bypass electromagnetic valve 4, the evaporation coil electromagnetic valve 8, the secondary heat exchanging coil electromagnetic valve 9 and the temperature-humidity transmitter 21 are electrically connected % with the intelligent control cabinet 7 respectively.

As an improvement of the above embodiment solution, the environment-friendly energy-saving parallel-connection temperature-humidity regulation and control equipment further comprises a liquid storage device 5, wherein the liquid storage device 5 is connected in series onto a pipeline before the output end of the condenser 3 is divided into two paths, one end of the bypass electromagnetic valve 4 is connected onto the pipeline between the output end of the compressor unit and the input end of the condenser 3, and the other end is connected to the output end of the liquid storage device 5.

A an improvement of the above embodiment solution, the environment-friendly energy-saving parallel-connection temperature-humidity regulation and control equipment further comprises an external rotor motor 15 electrically connected with the intelligent control cabinet 7, wherein the external rotor motor 15 is disposed at one side of the evaporation coil 13, negative pressure opening of the external rotor motor 15 is opposite to the evaporation coil 13, and the secondary, heat exchanging coil 14 is disposed between the evaporation coil 13 and the external rotor motor 15.

As an improvement of the above embodiment solution, the environment-friendly energy-saving parallel-connection temperature-humidity regulation and control equipment further comprises a high pressure sensor 17, a low pressure sensor 16 and first controllers 18 which are separately electrically connected with the intelligent control cabinet 7, wherein the high pressure sensor 17 is arranged at the output end of the compressor unit, the low pressure sensor 16 is arranged at the input end of the compressor unit, and each compressor 1 is respectively provided with the first controller 18.

As an improvement of the above embodiment solution, the compressor unit is further provided with a second rain controller 19 used for protecting parts such as the compressors 1; the second main controller 19 generally adopts a normally-closed signal and adopts a serial-connection form in the application process; when the oil pressure is excessively low or the high pressure is excessively high (set values of both the high pressure and the lower pressure are adjustable in a given range), the second main controller may be in a disconnected state; and when monitoring that the high and low pressure controllers are in an open-circuit state, an intelligent control system may stop the operation of relevant parts seas to play a role of protecting the system.

As an improvement of the above embodiment solution, the environment-friendly energy-saving parallel-connection temperature-humidity regulation and control equipment further comprises electronic oil balancers 20, wherein the electronic oil balancers 20 are respectively arranged between each compressor 1 and the oil separator 2. Each electronic oil balancer 20 is an apparatus with an oil level sensor and an electromagnetic valve. When detecting that a lubricating oil level in the compressor 1 is low, the oil level sensor may transmit a signal to open the electromagnetic valve, so that the lubricating oil in an oil storage device in the oil separator 2 is supplemented into a cylinder body of the compressor to ensure the sufficiency of the lubricating oil in the compressor 1, thereby ensuring the normal operation of the compressor 1 and playing roles of lubricating and cooling various moving parts of the compressor 1. When the oil level in the compressor 1 is excessively low and the corresponding lubricating oil cannot be supplemented, the electronic oil balancer 20 may transmit an alarming signal, and the work of the corresponding compressor 1 is stopped by the intelligent control system, thereby playing a role of protection.

As an improvement, of the above embodiment solution, the throttling apparatus 10 is a thermal expansion valve, wherein the thermal expansion valve comprises a valve body, a capillary tube and a temperature sensing bulb, the temperature sensing bulb is arranged at the output end of the evaporation coil 13, and the temperature sensing bulb is connected with the valve body through the capillary tube,

As an improvement of the above embodiment solution, the secondary heat exchanging coil 14 is a fin-type condenser 3 with a role of substituting the traditional auxiliary electric heating to heat and regulate the temperature of the circulating air, thereby preventing the rapid decrease of the temperature in a refrigerating chamber in a freezing dehumidification process from causing the stopping of the dehumidification because the refrigerating temperature already reaches a lower limit of a control range when the absolute humidity in the refrigerating chamber does not reach an ideal state. The secondary heat exchanging coil 14 is adopted to utilize the condensation waste heat to heat and regulate the temperature of the circulating air so as to slow down the decrease rate of the temperature of the refrigerating chamber, thereby providing more favorable operation conditions for the operation of the freezing dehumidification and improving the dehumidification capacity of the system to meet the control need of the drug storage refrigerating chamber on the temperature and the relative humidity.

Besides a refrigerant circulating system, the environment-friendly energy-saving parallel-connection temperature-humidity regulation and control equipment further comprises a control system; the temperature-humidity transmitter 21 disposed in the temperature-humidity controlled region 100 acquires an indoor temperature-humidity signal and feeds back the signal to an energy-saving temperature-regulation dehumidification system control cabinet; relevant logic operation and comparison are performed through a programmable logic controller (PLC) in the control cabinet, an operation mode of the environment-friendly energy-saving parallel-connection temperature-humidity regulation and control equipment is automatically selected, and a relevant control signal is transmitted to control the operation state of relevant parts, thereby achieving an objective of automatically controlling the temperature and the humidity

For example: the temperature-humidity regulation and control equipment is used in a drug refrigerating chamber, the temperature of the refrigerating chamber is required to be controlled between 2° C. and 8° C., the relative humidity is required to be controlled between 35% and 75%, and parameters of the control system of the temperature-humidity regulation and control equipment can be set as follows: basic operation parameters of a temperature regulation mode are set as follows: a power-on temperature is 7° C., and a power-off temperature is 3.0° C., and parameters of a dehumidification mode are set as follows: a temperature lower limit is 3.2° C., temperature upper limit is 7.0° C., the relative humidity when the dehumidification is stopped is 50%, and the relative humidity when the dehumidification is started is 70% (according to a principle that the temperature is in priority, and on the premise of ensuring the temperature of the refrigerating chamber to be between 3° C. and 7° C., the relative humidity of the refrigerating chamber is regulated and controlled).

State in the Ending condition of Serial refrigerating Operation corresponding operation number chamber state state 1 The temperature Regulating A. The temperature in the in the the refrigerating chamber is refrigerating temperature lower than or equal to chamber is 3° C. higher than B. When the temperature or equal to in the refrigerating 7.0° C. chamber is between 3.0° C. and 7.0° C., the relative humidity is greater than 70% 2 The temperature Dehu- A. The relative humidity in in the midifying the refrigerating refrigerating chamber is smaller than chamber is or equal to 50% between 3.0° C. B. The temperature in the and 7.0° C., refrigerating chamber is and the relative lower than or equal to humidity is 3.2° C. greater than 70% C. The temperature in the refrigerating chamber is equal to 7° C. (the control system is auto- matically switched to be operated at a temper- ature regulation mode)

Referring to the structural schematic diagram of the system, an operation process of the system is as follows:

The temperature-humidity state parameter signals in the temperature-humidity controlled region are acquired by the temperature-humidity transmitter 21, the signals are transmitted to the intelligent control cabinet 7, the intelligent control cabinet 7 performs the operation and logic analysis on the signals through the operation comparison and logic analysis of internal programs and transmits a corresponding control signal to control the working states of various parts.

Then the temperature-humidity state of the temperature-humidity controlled region satisfies the temperature regulation operation condition, the temperature-humidity regulation and control equipment is operated at the temperature regulation mode: the compressors 1 are started, high-temperature high-pressure refrigerant gas discharged from an exhaust opening of the compressors 1 passes through the oil separator 2 to enter the condenser 3 to perform the condensation heat exchanging (at the moment, the bypass electromagnetic valve 4 is in a closed state); after the condensation heat exchanging of the condenser 3, the high-temperature high-pressure refrigerant gas becomes medium-temperature high-pressure refrigerant liquid which enters a refrigerant liquid supply pipeline through the liquid storage device 5 to reach the front ends of the evaporation coil electromagnetic valve 8 and the secondary heat exchanging coil electromagnetic valve 9, the evaporation coil electromagnetic valve 8 is in an open state (the refrigerant can pass through) at the temperature regulation operation mode, and the secondary heat exchanging coil electromagnetic valve 9 is in a closed state; the refrigerant liquid enters the throttling apparatus 10 through the evaporation coil electromagnetic valve 8; after being decompressed and throttled by the throttling apparatus 10, the refrigerant enters the evaporation coil 13 to be evaporated; at the moment, the external rotor motor 15 of the indoor heat exchanging equipment 12 (the indoor heat exchanger unit) is in a high-speed operation state; the air in the temperature-humidity controlled region is forced, to perform the heat exchange through the evaporation coil 13 of the indoor heat exchanging device 12 so as to achieve a refrigerating and temperature regulation objective; and the liquid refrigerant after the evaporation heat exchange of the evaporation coil 13 becomes low-temperature low-pressure gaseous refrigerant (or containing little incompletely-evaporated refrigerant liquid) and returns to the gas-liquid separator 6: after being processed by the gas-liquid separator 6, the gaseous refrigerant reaches a gas absorption end of the compressor 1, and after being compressed by the compressor 1, the refrigerant is discharged from the exhaust opening of the compressor 1, thereby forming a complete refrigerant circulating path under the temperature regulation mode. This system is of course a parallel-connection system which realizes that a compression process of the refrigerant from a low-temperature low-pressure gas state to a high-temperature high-pressure gas state is completed by two or more compressors 1 of a same model or different models; the starting and stopping number of the compressors is fed back to the intelligent control cabinet 7 via a pressure parameter value acquired by the low pressure sensor 16; the control cabinet transmits the relevant control signal according to a preset logic relation to automatically complete the loading (increasing the number of starting the compressors) and unloading (reducing the number of starting compressors) of the refrigerating system; and the starting and stopping sequence of the compressors can also be determined by an accumulated operation time, so that the accumulated operation time of each compressor is relatively balanced. The number of the indoor heat exchanging equipment 12 in the temperature-humidity controlled region mad be multiple, and an operation state may also be controlled independently.

When the temperature-humidity transmitter 21 detects that the temperature in the refrigerating chamber is between 3° C. and 7° C. and the relative humidity in the refrigerating chamber is greater than 70%, the temperature-humidity regulation and control equipment is automatically switched to be operated at a dehumidification mode, and the system process at the moment is s follows:

the compressors 1 are started; after the high-temperature high-pressure refrigerant gas discharged from the exhaust opening of each compressor 1 passes through the oil separator 2, since the bypass electromagnetic valve 4 at this mode is in an open state, a part of the high-temperature high-pressure refrigerant gas passes through the electromagnetic valve without flowing through the condenser 3 and the liquid storage device 5 to directly reach the front ends of the evaporation coil electromagnetic valve 8 and the secondary heat exchanging coil electromagnetic valve 9 through the refrigerant pipeline; the evaporation coil electromagnetic valve 8 at the dehumidification operation mode is in a closed state, the secondary heat exchanging coil electromagnetic valve 9 is in an open state (the refrigerant can pass through); and after the high-pressure and high-temperature refrigerant is cooled by the secondary heat exchanging coil 14 and decompressed and throttled by the throttling apparatus 10, the refrigerant enters the evaporation coil 13 to be evaporated: at the moment, the external rotor motor 14 of the indoor heat exchanging device 12 is in a low-speed operation state (on one, hand, the circulating air in the temperature-humidity controlled region is forced to perform the sufficient heat exchange through the evaporation coil 13 of the indoor heat exchanging device 12, the circulating air is allowed to reach a temperature lower than a dew point at the evaporation coil 13, and the condensed water is separated at a fin and discharged out of the refrigerating chamber through a water discharging system for achieving a freezing dehumidification objective; and on the other hand, in order to prevent the circulating air at the evaporation coil 13 from being cooled excessively, the condensation heat is used to perform the auxiliary heating for the circulating air after the freezing dehumidification at the secondary heat exchanging coil 14); the liquid refrigerant after evaporation and heat exchange in the evaporation coil 13 becomes a low-temperature low-pressure gaseous refrigerant (or containing little incompletely-evaporated refrigerant liquid) and returns to the gas-liquid separator 6; and, after being processed by the gas-liquid separator 6, the gaseous refrigerant reaches the gas absorption end of the compressor 1, and after being compressed by the compressor 1, the gaseous refrigerant is discharged from the exhaust opening of the compressor 1, thereby forming a complete refrigerant circulating path under the dehumidification mode. Similarly, the system is a parallel-connection system; the number of starting and stopping (loading and unloading) of the compressors 1 of the system and the operation states of the indoor heat exchanging equipment 12 are fed back to the intelligent control cabinet 7 via relevant signals acquired by the low pressure sensor 16 and the temperature-humidity transmitter 21; and the intelligent control cabinet 7 transmits relevant refrigerating signals according to the set logic relation to control various parts.

Besides the refrigerant circulating system, the temperature-humidity regulation and control equipment also comprises the control system; the temperature-humidity transmitter 21 disposed in the temperature-humidity controlled region acquires the indoor temperature-humidity signals; the low pressure sensor 16 disposed at, a gas return end of the refrigerating system acquires a pressure signal of the refrigerating system and feeds back the signal to the intelligent cabinet; by virtue of relevant logic operation and comparison of the programmable logic controller (PLC) in the control cabinet, the operation mode of the temperature-humidity regulation and control equipment and loading and unloading for system operation can be automatically selected; and a relevant control signal is transmitted to control the operation states of relevant parts, thereby realizing an objective of automatically controlling the temperature and the humidity.

The technical, solutions provided by embodiments of the utility model are described above in detail. The principle and implementation ways of embodiments of the utility model are described herein through specific examples. The description of the above embodiments is only suitable for helping to understand the principle of embodiments of the utility model. Meanwhile, the ordinary skilled in the art can make modifications on the specific implementation ways and application scope according to embodiments of the utility model. In general, the contents of the description shall not be construed as a limitation to the utility model, 

We claim:
 1. Environment-friendly energy-saving parallel-collection temperature-humidity regulation and control equipment, comprising a compressor unit, an oil separator, a condenser, indoor heat exchanger units and a gas-liquid separator which are connected with one another through pipelines, wherein each compressor unit comprises two or more compressors, and the compressors adopt a same model or different models; the number of the indoor heat exchanger units is two or more, each indoor heat exchanger unit comprises an evaporation coil and a secondary heat exchanging coil, wherein the evaporation coil, and the secondary heat exchanging coil are disposed in a temperature-humidity controlled region, and the temperature-humidity controlled region is further internally provided with a temperature-humidity transmitter; the output end of the compressor unit is connected with the input end of the condenser through the oil separator; the output end of the condenser is divided into two paths; one path is connected with the input end of the evaporation coil through an evaporation coil electromagnetic valve, and the other path is connected with the input end of the secondary heat exchanging coil through a secondary heat exchanging coil electromagnetic valve; the output end of the secondary heat exchanging coil is connected with the input end of a check valve, and the output end of the check valve and the output, end of the evaporation coil electromagnetic valve are combined into one path and then jointly connected to the input end of the evaporation coil through a throttling apparatus, and the output end of the evaporation coil is connected to the input end of the compressor unit through the gas-liquid separator; further comprising a bypass electromagnetic valve, wherein one end of the bypass electromagnetic valve is connected onto a pipeline between the output end of the compressor unit and the input end of the condenser, and the other end is connected onto a pipeline before the output end of the condenser is divided into two paths; and further comprising an intelligent control cabinet, wherein the compressor unit, the bypass electromagnetic valve, the evaporation coil electromagnetic valve, the secondary heat exchanging coil electromagnetic valve and the temperature-humidity transmitter are respectively electrically connected with the intelligent control cabinet.
 2. The environment-friendly energy-saving parallel-connection temperature-humidity regulation and control equipment according to claim 1, wherein the environment-friendly energy-saving parallel-connection temperature-humidity regulation and control equipment further comprises a liquid storage device, wherein the liquid storage device is connected in series onto a pipeline before the output end of the condenser is divided into two paths, one end of the bypass electromagnetic valve is connected onto the pipeline between the output end of the compressor unit and the input end of the condenser, and the other end is connected to the output end of the liquid storage device.
 3. The environment-friendly energy-saving parallel-connection temperature-humidity regulation and control equipment according to claim 1, wherein the environment-friendly energy-saving parallel-connection temperature-humidity regulation and control equipment further comprises an external rotor motor electrically connected with the intelligent control cabinet, wherein the external rotor motor is disposed at one side of the evaporation coil, a negative pressure opening of the external rotor motor is opposite to the evaporation coil, and the secondary heat exchanging coil is disposed between the evaporation coil and the external rotor motor.
 4. The environment-friendly energy-saving parallel-connection temperature-humidity regulation and control equipment according to claim 1, wherein the environment-friendly energy-saving parallel-connection temperature-humidity regulation and control equipment further comprises a high pressure sensor, a low pressure sensor and first controllers which are electrically connected with the intelligent control cabinet respectively, wherein the high pressure sensor is arranged at the output end of the compressor unit, the low pressure sensor is arranged at the input end of the compressor unit, and each compressor is respectively provided with the first controller.
 5. The environment-friendly energy-saving parallel-connection temperature-humidity regulation and control equipment according to claim 4, wherein the compressor unit is further provided with a second main controller
 6. The environment-friendly energy-saving parallel-connection temperature-humidity regulation and control equipment according to claim 1, wherein the environment-friendly energy-saving parallel-connection temperature-humidity regulation and control, equipment further comprises electronic oil balancers, wherein the electronic oil balancers are respectively arranged between each compressor and the oil separator.
 7. The environment-friendly energy-saving parallel-connection temperature-humidity regulation and control equipment according to claim 1, wherein the throttling apparatus is a thermal expansion valve, wherein the thermal expansion valve comprises a valve body, a capillary tube and a temperature sensing bulb, the temperature sensing bulb is arranged at the output end of the evaporation coil, and the temperature sensing bulb is connected with the valve body through the capillary tube.
 8. The environment-friendly energy-saving parallel-connection temperature-humidity regulation and control equipment according to claim 1, wherein the secondary heat exchanging coil is a fin-type condenser. 